Air filtration unit



FIG. 1 is a front elevation view of the air filtration unit of the present invention;

FIG. 2 is a back elevation view of the air filtration unit of FIG. 1;

FIG. 3 is a left side elevation view of the air filtration unit of FIG. 1;

FIG. 4 is a right side elevation view of the air filtration unit of FIG. 1;

FIG. 5 is a top plan view of the air filtration unit of FIG. 1; and,

FIG. 6 is a bottom plan view of the air filtration unit of FIG. 1.

The hose has been shown broken-away in FIGS. 1-6 to indicate indeterminate length. The cross-hatching on the band in FIGS. 2-6 represents conventional fabric and is understood to extend uniformly throughout the area represented. 

The ornamental design for an air filtration unit, as shown and described. 